Controlling device for automatic weft-replenishing looms.



PATBNTED DEG. 24, 1907. A. E., A. da G. WALKER. CONTROLLING DEVICE FORAUTOMATIC WBPT RBPLENISHING LOOMS.

APPLIOATION FILED 00T. 16, `1905.

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CONTROLLING DEVIE PDR AUTOMATIC WBPT REPLENISHING LOOMS.

APPLICATION FILED 00T.16, 1905.

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No. 874,550. PATENTED DEG. 24, 190'?.

A. B., A. & G. WALKER.

'l GONTROLLING DEVICE PUR AUTOMATIC WEFT BEPLENISHING LOOMS.

APPLIoATIoN FILED 00T. 16, 1905.

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A. E., A. 0 0. WALKER.

GONTRULLING DEVICE POR AUTOMATIC WEPT REPLENISHING' LOOMS.

APPLIoATIoN FILED 00T.1e, 1905.

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4f! .45 wm/55.55. /A/ vfA/roRs PATENTEI) DEG. 24, 1907.

A. E., A. & G. WALKER. CONTROLLING DEVICE IOR AUTOMATIC WEITREPLENISI-IING LOOMS.

APPLICATION FILED 00T.16, 1905.

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UNITED sTATEs PATENT oEErcE.

ALBERT EDWARD WALKER, ARTHUR WALKER, AND GEORGE WALKER, OF N ORWOODGREEN,

' NEAR HALIFAX, ENGLAND.

CONTROLLING- DEVICE FOR AUTOMATIC WEET-REPLENIS-VHING LOOKS.

Specification of Letters Patent.

. Patented Dec. 24, 1907.

Application led October 16. 1905. Serial No. 283.025.

.To all whom 'it may concern:

Be it known that we, ALBERT EDWARD WALKER, ARTHUR WALKER, -and GEORGEWALKER, subjects of the King of Great Britain, residing at NorwoodGreen, near Halifax, En land, have invented a certain new and useulImprovement in Controlling Devices for Automatic Weft ReplenishingLooms, of which the following is a specification.

Vposition of the weft-detector- The invention is carried into effect byarranging the detecting deviccL-which may be brought into contact withthe bobbin in the shuttle somewhat in the manner described in thespecification to our United States Patent No. 7 96,882--in the circuitof an electric current from a suitable generator so that said circuit iscompleted by the contact of the demechanism of the character describedin the above mentioned specification. Fig. 2 is a side elevation partlyin section on an enlarged scale of the detecting device and part of theshuttle. Fig. 3 is a plan of Fig. 2. Fig. 4 is a sectional view of thefoot of the detector on line a-b of Fig. 6. Fi 5 is a similar view online c--d of Fig. 6. Fig. 6 is an under plan of the detector foot. Fig.7 is a side elevation partly in section on a larger scale than Fig. 1 ofthe application of our invention to operating mechanism of the characterdescribed in the specification to our 8 is a plan of Fi 7.. Fig. 9 is aplanof a shuttle with bob in-and Fi 10 is a diagram illustrating anumber o combinations of action where six pairs of terminals are used.

The detecting device comprises Vthe usual short arm 4 rotatably carriedon a stud 5 fixed in any convenient position, such as on the front ofthe loom frame 1 opposite to the shuttle-box 3, and adjustably holdingthe swingingrod 7 which in the present case swings only for the urposeof enabling it to yield if the feeling ngerA meets an obstruction. Tothe enlarged part 8 .of the rod 7 is attached the bracket 9 whichcarries the feeler or detector finger 10, the novel-construction ofwhich constitutes' the principal part of the invention.

The detector finger 10 carries, as shown more clearly in Figs. 3, 4, 5and 6, the positive and negative terminals 12, 11, ofwires or leads 34,-13 from and to a suitable generator. These terminals are subdivided toany required extent. The terminals are car- Umted States Patent No.796,950. Fig.

ried in the foot 14 of saidiinger and are arranged alternately positiveand negative as shown, and arev mounted preferably on springs 15, 16, sothat each terminal is capable of separate movement, thus giving amultiplicity of movable feeling points to the detector iinger. In theconstruction shown the finger 10 itself acts as the conductor from lead34 to one set of terminals 12, While a plate 20 acts as the conductortolead 13 from the other set 11.` The terminals carry stop 'pieces 17which rest against shoulders formed in the recesses 18 in the part 19-which carries them, and said terminals are preferably of differentlengths in order that they may normally conform .to the contour of thebobbin.

Interposed between the inner faces of the part 19 and the foot 14 aretwo plates, 20, 21, (Figs. 4 and 5) of conducting and nonconductingmaterials respectively. Both plates are perforated for the passage ofthe springs 16 of one set 12 of terminals, while the springs 15 of theother set 11 abut against the conducting plate 20. The current passesfrom lead 34 through the finger 10 itself to the springs' 16, and fromthe springs 15 through plate 20 to lead 13.

The detector finger 10 is brought in conpin or the tion on bracketiece9.'

` when the foot 14 ofthe The detector ger 10 is provided with' a boss 28through which the pin 23 passes', which boss is partly undercut at 29 toform two angular faces, 'which 'are alternately ada ted to rest u on aflat face 30 formed at t e junction o the depending finger 22 and itsextension 26, whereby the detector finger can yield with a movementwhich is limited by the faces which form shoulders or stops when vthedepending finger `22 brings the detectorfoot 14 in contact with the amon the bobbin.

T e bobbin 31, Figs. 2 and 9, is fitted with a metal hoop or part, suchas a copper band 32, see also Fig. 3, or some other suitable conduct'part, at the point of contact of the detectdilnger to act as acontact-piece and comilete the circuit, which remains interrupte by theyarn on the bobbin 31 .until said yarn is drawn off to ex ose the iece32 etector ger is brought against it and the circuit thereby completedthrou h the terminals 1 1, 12. Owing to the num er of contact points itwill 'be seen that at the moment when the contact-piece on the bobbin isexposed the shuttle 38 may either go beyond or fall short of itsusualposition in the shuttle-box and yet the circuit will be completedand the shuttle be discharged at the proper time with a regular andminimum amount of yarn left upon thebobbin, for the reason that underwhichever pair of terminals the exposed contactpiece comes to rest,'thecircuit is completed.

For example, if three pairs oi terminals are employed and disposed in asingle row parallel to the bobbin, should the shuttle come to V rest in,its usual position the middle'pair will fall upon the contactpiece 32while the outer air will fall ineiectively upon thenonconuctive partofthelbobbin and the inner pair upon the yarn remaining on the bobbin andbe elevated by it without disturbing the lower position of the otherpairs, since-the yielding movement of -each terminal is in- `de ndent ofthe others.

A the device-herein described six pairs of areemployed and dis osed 1nthree rows as shownin the diagram C ig. 10) which illustrates thethirty-six` different combinations of operative pairs which may beoccasioned bythe varying position of the bobbin lead 34 from the one setof terminals -12- passes to the generator, which may take the form of abattery 35 (Fig. 1) conveniently arranged on or adjacent to the loom,and

thence to an electro-magnet 36, Figs. 1, 7 and 8, attached to theframe 1. The other lead 13 from the set of terminalsv 11 passes directto said electro-magnet, so that upon the circuit being completed, amovement of the armature 37 results, Which movement is utilized throughintermediate mechanism to put into operation the Weft-replenishingmechanism.

An suitable intermediate mechanism may e employed to receive themovement of the armature 37, and in Figs. 1, 7 and 8 is shown aconvenient and preferable form, such as that described in our UnitedStates specification No. 796950, referred to, which comdprises acylinder 39 carrying perforated car s operated by'two ratchets and paWlsa perfect ratchet 40 having its pawl 41fnormally held out of action by amovable rod 42 and an'imperfect ratchet 43 having its pawl 44 normallypassing inactive over the space of the missing tooth. In the presentcase however a movable rod 42 which puts the pawl 41 of the perfectratchet'40- the startlng ratchet of the cylinder--into and out of actionis attached to the armature 37 of the magnet. This rod rests normallyunder the Weighted projection 45 of the pawl 41 keep-' ing it out ofaction with the ratchet. When ythe armature is attracted to themagnetthe loo motion. The rotation of the cylinder is then taken up bythe imperfect ratchet 43 and continued until the space of the missing'tooth again arrives under the pawl 44.' The usual spring 46 on thearmature 37 returns the ro to its position under the weightedyprojection of the pawl 41 when the latter rises.

What We claim is 1; In automatic Weft-replenishing looms, and incombination, a controlling device comprisin a feeling nger, a separatepart carried thereby and having recesses therein, a number ofindependently movable positive and ne ative electric terminals arrangedalternate y and located partly within said recesses, springs withinsaidA recesses, for controlling the movement of said terminals, stopApieces also within the recesses for limiting said movement, electricconnections between said terminals and a source of electric supply, abobbin having a conductive part thereon with which said terminals areadapted to contact to complete the circuit, Weitreplenishing mechanism,and means operable on the completion of said cicuit for actuating saidWeft-replenisln'ng mechanism.

2. In automatic weft-replenishing looms and in combination a movablefeeling finger, a number of movable feeling points carried thereby toform the terminals of an electric circuit, a source of electric supply,electric connections between the latter and the terminals, a bobbin, aconductive part thereon With which saidv terminals are adapted tocontact to complete the circuit, means for moving said iinger to bringsaid terminals into contact With the bobbin, means comprising springsand a boss on the feeling iinger having undercut angular faces thereonadapted to contact with a face on a depending part for controlling themovement of the finger, Weft-replenishing mechanism and means operatedby the completion of the 'circuit for actuating said weft-replenishingmechanism.

In testimony whereof We have hereunto set our'hands in the presence oftwo subscribing Witnesses.

ALBERT EDWARD WALKER ARTHUR WALKER. GEORGE WALKER.

Witnesses:

' FRED HAMMOND,

W. H. KENNARD-

